Advanced Hydrofoil Apparatus

ABSTRACT

Hydrofoils are a device that is used to decrease the resistance of a water traveling apparatus. It does this by creating lift on its wings which pushes the apparatus off the surface of the water, to reduce friction. My patent pertains to hydrofoils that are attached onto boards for various water sports. These board sports include, but aren&#39;t limited to, surfing, stand up paddling, kitesurfing, kiteboarding, wakeboarding, wake surfing, and windsurfing.

03/02/18

To conserve or even increase velocity a rider can pump the hydrofoilthrough the water in a sinusoidal like path. In this motion thehydrofoil pushes water backwards, thus propelling the apparatus forward.A way to enhance a hydrofoil's propulsion when pumped is by having itsfuselage be flexible, and preferably elastic as well. In the pumpingmotion of the hydrofoil the front wing starts the motion and thefuselage, and back wing follow its path. A hydrofoil with a flexiblefuselage would be more able to make a sinusoidal path following thefront wing, thus making it more efficient. However, not all the fuselageshould be flexible. The fuselages' flexibility should only be betweenwhere the mast connects to the fuselage, to where the back wing connectsto the fuselage. If the fuselage is flexible between where the frontwing connects to the fuselage to where the mast connects to the fuselageit will cause the front wing to angle the wrong way when pumped. As aresult, it will create additional resistance that will slow down thehydrofoil and the rider. The fuselage should not bend up and down like abird's wings, rather it should make a whip like motion with the backwing, much like how dolphins move their tale.

03/12/18

Another design that can help the hydrofoil create more propulsion whenpumped is a downward sloping curve in the fuselage and or the back tail.This design gives more leverage to the rider for pumping.

7/19/18

A flexible tail wing or flexible part trailing the tail wing can be usedto create propulsion on a hydrofoil much like how a swim flipper propelsa swimmer.

8/27/18

Hydrofoil wings are made with the front wing creating upward lift andthe back wing creating downward lift. This increase lifting leverage butmakes it hard to keep the foil from coming out of the water when ridingfast. An uplifting front and back wing on foil would create lift withoutangling the foil to come out of the water. This would be a great foilfor high speed riders.

A hydrofoil could have a fuselage that has a greater height than width.This will make the fuselage its strongest with least amount of volume.Smaller volume is critical in hydrodynamics. To take advantage of thisdesign the top and bottom of the fuselage can be rounded or pointed.This design also reduces resistance when the rider pumps.

To make a hydrofoil easily attach and detach from a board one or moreclamps can be used. At the top of the mast an attachment plate fitstogether with the track that is built into the board. A clamp system canbe used in securely attaching the attachment plate to the track.

9/30/18

In order to make a hydrofoil for board sports more stable for beginnerriders the hydrofoil apparatus can have more than one mast. Thisincrease in stability will allow for more advanced and less stable wingsto be used and allow for improved performance.

DESCRIPTION OF DRAWINGS

FIG. 1 shows a hydrofoil for a board sport. 100 is the front wing. 101is the fuselage. 101 a is the top portion of the fuselage and 101 b isthe bottom portion as referred to in claim 3. 102 is the back wing. 103is the mast.

FIG. 2 shows two cross sectional cuts of the fuselage. 101 c is afuselage where the top and bottom portion have a pointed shape. 101 d isa fuselage where the top and bottom portion have a rounded shape.

FIG. 3 shows a hydrofoil with a downward curving fuselage (101 e).

FIG. 4 shows the clamp system of attachment which connects the hydrofoilto the board. 105 is the attachment apparatus which is connected to themast and rest of hydrofoil. It fits into the track (108) which is builtinto the board (107). 106 is the clamp mechanism that hooks around 105and clamps it to the board to create a simple hydrofoil to boardattachment system.

1. A hydrofoil with a fuselage that is flexible from where the mastattaches, down to where it attaches to the tail. So that the fuselagecan make a sinusoidal like motion through the water to generate speed.2. Downward sloping fuselage or tail on hydrofoil.
 3. A hydrofoil with aflexible back wing; where said wing's flexibility is along the generalaxis of the forward moving path of the hydrofoil, (which is parallelwith the fuselage) or a flexible part trailing the tail wing with thesame general axis of flexibility.
 4. A hydrofoil meant for board sportsthat has both the front and back wing create lift.
 5. A hydrofoilfuselage where the top (101 a) or bottom (101 b) portions of thefuselage are in a pointed shape, or in a rounded shape where the surfacearea between 101 a and 101 b has a lesser curve.
 6. A clamp system thatsecures the hydrofoil to the board.
 7. A hydrofoil meant for boardsports that has more than one mast.